AirHint found the following cheapest return flights from Mexico City (MEX) to Buenos Aires (EZE) in September 2026 (see full year).

Return flights

16 Sep - 22 Sep	Arajet
17 Sep - 26 Sep	Arajet
23 Sep - 30 Sep	Arajet
19 Sep - 27 Sep	Arajet
11 Sep - 19 Sep	Avianca
06 Sep - 19 Sep	Avianca
06 Sep - 14 Sep	Avianca
01 Sep - 07 Sep	Avianca
01 Sep - 10 Sep	Avianca
19 Sep - 01 Oct	Avianca
24 Sep - 08 Oct	Avianca
10 Sep - 19 Sep	Avianca
23 Sep - 05 Oct	United
26 Sep - 05 Oct	United

Also check the deals for one-way flights from Mexico City to Buenos Aires in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Mexico City to Buenos Aires in September from $702

Return flights